رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 866
The Book of Greetings
Greeting Non-Muslims and the Prohibition of Taking Initiative in Doing So
عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّه عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ قَالَ: لاَ تَبْدَءُوا الْيَهُودَ وَلاَ النَّصَارَى بِالسَّلاَمِ، فَإِذَا لَقِيتُمْ أَحَدَهُمْ فِي طَرِيقٍ فَاضْطَرُّوهُ إِلَى أَضْيَقِهِ ((رَوَاهُ مُسْلِم)).
Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) said, "Do not greet the Jews and the Christians before they greet you; and when you meet any one of them on the road, force him to go to the narrowest part of it." [Muslim].
Riyad as-Salihin, 866